详解Qt如何实现一键加载qm文件
作者:雲烟
这篇文章主要为大家详细介绍了Qt实现一键加载qm文件的相关方法,文中的示例代码讲解详细,具有一定的借鉴价值,有需要的小伙伴可以参考下
背景
多个子项目,分别翻译生成的qm文件,如何一键加载?
.h
#include <QtCore/QObject> #include <QtCore/QTranslator> class LanguageSelector:public QObeject{ Q_OBJECT public: ~LanguageSelector() override = default; void setLanguage(const QString &l); QString getLanguage(); void addLanguageFile(const QString &n); void removeLanguageFile(const QString &n); void reload(); static LanguageSelector *getInstance(); signals: void languageChanged(const QString &l); privite: LanguageSelector(); static LanguageSelector* instance; static constexpr char CONFIGER_KEY[] = "system/language"; QString baseDir; QList<QString> languageFiles; QList<QTranslator *> translations; }
.cpp
#include "languageselector.h" #include <QApplication> #include <QCoreApplication> #include <QDebug> #include <QStringBuilder> #include <QSettings> LanguageSelector *LanguageSelector::instance = nullptr; constexpr char LanguageSelector::CONFIGER_KEY[]; QString LanguageSelector::getLanguage() { return QSettings::value( CONFIGER_KEY, defaultValue ); } void LanguageSelector::setLanguage(const QString &language) { QSettings qs; auto ov = QSettings::value( CONFIGER_KEY, defaultValue ); qs::setValue( CONFIGER_KEY, language); if(ov != l){ reload(); emit languageChanged( language); } } LanguageSelector *LanguageSelector::getInstance() { if(!instance){ instance = new LanguageSelector; } return instance; } LanguageSelector::LanguageSelector() : baseDir( "i18n" ) {} void LanguageSelector::addLanguageFile(const QString &name) { if(name.isEmpty()){ return; } languageFiles.append(name); } void LanguageSelector::removeLanguageFile(const QString &name) { if(name.isEmpty()){ return; } languageFiles.removeOne(name); } void LanguageSelector::reload() { auto language = getLanguage(); QString qmBase = QApplication::applicationDirPath() + "/" + baseDir; if(!qmBase.isEmpty() && !qmBase.endWith("/")){ qmBase += "/"; } if(!translations.isEmpty()){ for(auto const t : translations){ QCoreApplication::removeTranslator(t); t->deleteLater(); } } for(auto const &qm :languageFiles){ auto *t = new QTranslator(this); if(t->load(qmBase % qm % "_" % language )) translations.append(t); QCoreApplication::installTranslator(t); }else{ qDebug() << "can not load lang file:" << qm << ", language" << language ; } }
使用
main中,节目构造之前添加:
auto ls = LanguageSelector::getInstance(); ls->addLangFile( "test" ); ls->addLangFile( "local" ); ls->addLangFile( "remote" ); ls->reload();
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